28990719 has 12 divisors (see below), whose sum is σ = 41938936. Its totient is φ = 19297872.

The previous prime is 28990711. The next prime is 28990727. The reversal of 28990719 is 91709982.

It is an interprime number because it is at equal distance from previous prime (28990711) and next prime (28990727).

It is not a de Polignac number, because 28990719 - 2³ = 28990711 is a prime.

It is a super-2 number, since 2×28990719² = 1680923576273922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28990711) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5037 + ... + 9129.

Almost surely, 2^28990719 is an apocalyptic number.

28990719 is a deficient number, since it is larger than the sum of its proper divisors (12948217).

28990719 is a wasteful number, since it uses less digits than its factorization.

28990719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4886 (or 4883 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 45.

The square root of 28990719 is about 5384.3030189617. The cubic root of 28990719 is about 307.1989041607.

The spelling of 28990719 in words is "twenty-eight million, nine hundred ninety thousand, seven hundred nineteen".